<HTML><HEAD><TITLE>all_union(+Sets, ?SetUnion)</TITLE>
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<H1>all_union(+Sets, ?SetUnion)</H1>
SetUnion is the union of all the sets in the list Sets
<DL>
<DT><EM>Sets</EM></DT>
<DD>a list of sets, set variables or set expressions
</DD>
<DT><EM>SetUnion</EM></DT>
<DD>a set, set variable, free variable or set expression
</DD>
</DL>

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